This particular cloak is usually of woolen-like material, although it can be leathern. It can be handled without harm, and it radiates magic. As soon as the cloak is worn, the wearer will be stricken stone dead. After its effects are known, a small label saying "Nessus Shirt Company" will be seen.
Tentative names for the constellations from top to bottom: Ragbaby, The Idiots, Imperial Measurer, Gravitar the Man-Ape, El Cunto and Alsip the Tentacular. (Some--or all--of these might not show up in the final map. Just working on some ideas.)